Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17761571268d8d0de05b084ece456a0f89996cc55011fa9fa3ab0554885e86d5' 
  AND token = '8Knfj08jHyVXqcUe2FD0K1Qrffcwbyn71jWSNr+rMbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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