SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4548d8c8bb3b1193f0bbf792ec2f82c6ab008b80a2d3d18a36bea3b8a405f6f8' 
  AND token = '9cYv/T1BrJZ5s6BzA4h5x/+YZnu0FchQUfRIwrj9IIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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