Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6be09e3e8ad201716a753ebdcba16fb25ad1ec20f5aee93fc4dc8a4cfae47d5' 
  AND token = 'hulAu40Gc54beKH1DSjHUcibtGYwcoZluIFTieJdNZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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