Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '724f542f262c9a50a97cbedd2e12d677bc0a989d4fffa8c1d7ae58de36ccb509' 
  AND token = 'Q9i+W7dFfAcyx0J1TJqQYZsk7phshSh5+/WW2WJsNDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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