Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4656203783db1deb79e61ad255408ac5d4910d243f11eb057ae221da74e2d817' 
  AND token = 'QZ4AMmfkQ5AlVTCGYLUogtkR9cNfMu5QO2jbbTtn7vw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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