Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ac9bf1d9f191678f83eb8005932e0c55c57efdce8e2a9ad4114b1210de06999' 
  AND token = 'L0MqlC083DkETcI0kiFSUaDzGDvQBDLBzvBSf4gPaKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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