Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3acb67442bfe3f0cedbe1cb8212d63d07a30748b695f588a17df4d27ac85b580' 
  AND token = '1MFRASy8g1UE75gZnOr5wfSiR6IqVoPMFJnrVTwZ9Dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}