SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8913a6e969d77f9b5fda70f0841d3dde896592061198b65ac4533362c0db0522' 
  AND token = 'HuqFNZRV/G5kDQSFxRmGILeQjD4Sd43qMQZeVm5/prY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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