Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '04dafecaa646ae6a4f42fc47e2d2c5a2f61a5c397c8ff03ef269e41a39e4dd3c' 
  AND token = 'vTSRibw77xXDf81/UMVDWT5S1IznZxe2y/NDc5EM2ho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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