Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23cf49a20f6e89d120ba4929324991efc770c314710e1afca49934cd934753a3' 
  AND token = 'v6sET4bP5rDQYTN70vbzRw8jAeAZh6HNwnqvI72Wr6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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