Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3d28fdb034684765c8f4e40776ee16bd164d3472db618eeb573259117a8f071' 
  AND token = 'TtQaP76bxiFoXGJL5uLtfqtEHOyc6nU0R8wKWQOgMHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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