Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cca458f583e03131a76bc185bee6d6b807776ee407611f86a34b4c2f7e0ebf7' 
  AND token = 'QoOpyOrZy2Eb6CJ6XUBtDRCCwSmFWfHOkbf6OrV5QTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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