Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1a605e23b892b2ccc1e1fda85a9d3133c01cb3ba433eb59b6c835347caf45b2c' 
  AND token = 'ayK/S4pZN2nHqj190z54CSR0WqEjqqZiakQqs73Viz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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