Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a65c1d37ff002fe526495fb0620c9e5fc5800c5b0e4b4799f43774ba64ccb5b' 
  AND token = 'pkVHqDlJ7xrSMaeMvYIk+P9mW7AVSUYra1gPPXX9rjk=' 
  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"
    }
  }
}