SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c57e6e9c20ad7993af08142f9bbed1f7a82e90ad8336dcb4123de8330dc04be7' 
  AND token = 'Fl5jR/lxpVWQQtG5E5iEwLV/XXAVwBOj0boaeJoKnBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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