Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '885f7b2346b58a3d3a8b1f85aa4f58aa42a07af4d845b4bda2b33781c7e9bdd2' 
  AND token = 'xNf1tOdWLlfUKcNChIVH/yXj+xMCZFByETo8Pzt4Jok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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