SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f13d54f8ca4f3de5b721027dc35398eba581532841e742869849b72f33f65be3' 
  AND token = 'G8GYqlWmPu9PPmW4CpOhloJdeQ1IL/atYNBk/25/S/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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