Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '625ad623347b05098d9cc384a6695fc7efc218ad01bee15855794ead5ed53a8e' 
  AND token = 'm0zvGM5yEaUXwM1ndNrBMrS1ZSchsvAUn7vkhQg521w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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