Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbf92c2136067fc2c58509a3f34f5699e310ae98ed84eadbecd99f01c131a354' 
  AND token = '3L34z5az0GKCy1jDt1zHgku8PZ6TN2O6CjxRrY5qcQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}