Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'acfd6bd8252a7ae4551fe1ba15f9530b495c8da2a1c6d445e8bd117bdc7e4e1e' 
  AND token = 'qonJAc6VHQGCxY+go4c6JyGa3HlCnF5Ed/oFmp0PP1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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