Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a31b9df89ad053b598efd204b528fc5b4dec96e5fc889c782e62b362505963d' 
  AND token = 'Em6wbbjbHnsx11qkhrBlCJY1XERByCX3yQvS7RoC+DI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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