Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b058b7ce66bec7d7164a98af7da4961dcf6ff2f6b26d4869393a9006045ee7de' 
  AND token = 'djcagyDxoOzBELz2uqQKyfkxMv45fIy8S3sCdBJrcU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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