Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8858613e8d2ede5cc0e367fe9c24821d024faf19fcaa8698cb87e5043fdc79c0' 
  AND token = 'yKb7AMBnXcP8AEDYkoqIUuxV95kV45rQcB2LAcTqOEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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