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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '401e17e71119db7563abb50007ac5c4440fc7e87ac4ab25898a4a6102147ea37' 
  AND token = 'oOWBR7hdEGpBw7efvk6Pm8qyyoZBpIVSYDt1jVKXYoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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