Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc3fbc27637ab4487885db520924d8cb0b1c4536df2c9b6b3eaeb10127066e17' 
  AND token = 'bKoHe0hom18lWo3lgSTbvE+whWkVIy8MvJjeRAse+j0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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