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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04e3fab71c60567178dd51145b7c4116854e1a61480011f346c95377638f6005' 
  AND token = 'BmzvDPaii81s09R9CNpexKLAw8fyJCu7NCPKxEXA9kM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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