Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c11aa1003630c383e03ba098aa844e705b29c67a3cf20de2a39bbc51a8295bbc' 
  AND token = 'gRNxyw9Xjtcx6JBltZ4K+7NWopxErYOy/wh7j/BYKJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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