Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7463c610775e0235771f35179e6bccfefe53bd827f5d4c36b5168b9855ed62c6' 
  AND token = 'ZKCt1h9EtbbxSDfxtulVp0aFBdXUWNoU6aElFbqo2Uo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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