SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7fcb19b24fd1ae0e0cf3301539c734485828beb9b073d60bcf4133d163b18f8b' 
  AND token = 'QQXwhie3DzrybPZPD7L0GdHPObG+L0Sq/CdbvGdz8YA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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