Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b80e4aa2b60516ae630dfe3d25baa723cabe2d0da38536ed1174b5c4545fe9ee' 
  AND token = '2nZmqIFAqqyQV98hI3i987g2LbgzagiVt7IuTy8NGj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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