Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a0338894c5b45b3fafb7b1fa85b2a8f6beb4d51a7d557f9637d4241568853022' 
  AND token = '774am3I1V/fSTdq6ZeWhwP988ljXEfqgmGcX09t0Xhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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