Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0d8e4a036a06af9f460b34734846b22fec48a6a0875e94011f11a713f4e8173' 
  AND token = 'LmdhSrAWm0cdCRFjlm7HXcw03FxzKB5bOXTx3k/CblE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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