Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49c7271d2a89a739747ad8a689b9723de5b908ea5de5e4fbc9230f471bbcd71d' 
  AND token = 'YKlOk3iq5wpP3kO6D7dlkkBzkbsFCC1/o4k57lS1jlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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