Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8378824fb681e84703967414ab1c953110127be5ac50ca02104496b84fc41b37' 
  AND token = 'w4CxInegdlpOuToqTRkrE+lAct345qzCcqpV+E9/mJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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