Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4423b65f05729f3e0d15af909a7cfdcf5f31d85625b7d9e563bc9b2f0a34bdba' 
  AND token = 'fivKbK1pJkPWLVdwoRmfN6NLajlTJcTIQNXbdIlTb5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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