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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11a4945477898fdd694863be5c5e9f62870fe07b7d442f44b77440d9a54b17d2' 
  AND token = 'CAIE2Vu897/J9GH0Jr9xxeKnDtUPsNs4Jk82JjSeJ/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}