Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c9e5348189c910a7052948efe738f758d98ef3fc1870b007672ea87f1d3d230' 
  AND token = '7/qWFGvPSVFTBoxi/90GIwgI61mtARC014cW6o4hIJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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