SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e5eba1630c9c43cbbffc114ce952b25d6df2f6f948445e807c5e8439ee66685' 
  AND token = 'OW2CBJ9G4bw8Un7cxqnQQchCwSBMI3Rtvb5SUhqAuvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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