Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c42d29eb4b92c553c81e4714a086ae844e47b7d269b6208b5f73bc04b0c33570' 
  AND token = 'rzxCnK/yl2tKknN/HmE46ldEkpzGPIMyUHzj1Zoah9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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