Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69daa1b2ec8ba0b0a2b734ff8a81aa9dbbb042cefbfd2e2f17ae4cc439d4023f' 
  AND token = 'z4q0AWs6wqrlCTZjuAQsrXEuj4v8Q1z7o4A4sIRfLQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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