Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e43f887c37655fe6441bb8354ec71121826575d97023db50c842221bb1f24d82' 
  AND token = '5FQD/d8turIKl1akbwXXodrRClnUI3p/YvNVOYwV4/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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