Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1955a67a318052fc0247d2863c6c76573c32cfde80837ef005f0e5f432386df' 
  AND token = 'rGyqxy+4kPoxflaDfS7ExwOhWCmy6DnYhb/zoMyPiS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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