Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69f439aca72f1e832d7b39beeaec29e2baca981a88b51ceaba8a1870c3471b00' 
  AND token = 'FMWleYmBJ2wOwDVWe7+HlBE/WTSFTgBqk19Q4OdRHvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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