Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5231b36308e6a80a4949faea1f6eac6cbae359e23896f3c4aded83ebd9497a93' 
  AND token = 'RSHWK6zMdd1b1vJFuxBhgvK4yJvpe0nqLfRLBv8zPJk=' 
  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"
    }
  }
}