Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e11f8a7a38cc7e1681057baab4c34512da2e345b39c79c1d72e22e1a340e7a2d' 
  AND token = 'RJtVda13HxXfCjh47SnLEqPvBGXCnI1qMYbdFvOh4Rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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