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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2325d3dbbbf98629d239e55b52b3312e782f944561445a73e4a7e1bbde47258' 
  AND token = 'LGAksdsnJ/2Spc0D+FMlfE2+b2yp0/4jiQ14zXrVt8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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