Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2452d394a68ab016b74bfa8bf7296256a65adc6c34c1d212edfe6db3f7014fd3' 
  AND token = 'R1otQzXVQmTSc1nUa6qiA/T6Mg7Uxug+WZibqwotEv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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