Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3c01a958a2811c6cbe1b9ec83c393499cbe43f7e6511dcf4b0a23454ee3ad26' 
  AND token = 'AzhpSXOQd8w2Qal8mmY6DOHIrCftjh6HwHLr2XRXCmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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