Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3aa871a772595dad13f8c2ae4cecbf395ad0f20c1071f5aa1d1a09e7acdbba27' 
  AND token = 'uXT7aaKh7R3UmIMaUIrvL0p15a1EEXhKeJoI8wQsZkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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