Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd85fbf5e5e53eefb1c7413c2bff8e7e9d2a17498fcfa52156d4b3941ed4fa002' 
  AND token = 'n1s2ryWZsEKkCPLfMLnHdeMD3IYhbtpoxBrY9t02Uxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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