Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6530b49da62e7447054fd4932bb0e7bb821ca1071ecca6faf49f45368316aa60' 
  AND token = 'xhLmPct56yFAEf09jNZbndreWTVcNN/pLEVVkVlUCdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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