Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1f3d0d9db8d64a7baf84a37bb2026a2e5926af08d163c256eb422d6990c9e56' 
  AND token = '0Kuk6wbNT2DRYVKAD/w1shcdPFESoZoT9Hs9OoWR8Ys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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