Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74ae11d1015c750e7f387da280a4c5db981e77ba8b693d6c63faf117de7e0255' 
  AND token = 'r6isxrPjaBlhQ1xtXebTMmRjqVRhHgC0J0LWidYy9bM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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