Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8f4803e1918275791dbe08d3ce3f739711ddba9f8974119cca273475f326a56' 
  AND token = 'WJN+aPflRSKuv80zN1iV2TzfOCuAoxhOV1MHtznhoPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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