Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e6a6842597d35039a41b85bd39fd0f2d8696206b9a5d9deaef8678450d4acb1' 
  AND token = '8dggu5aYFSqBbUYtSDILRMrfMT4G1421dt6k8HrD8/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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