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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12fc22d15ff7a58ceb90b41945bffa7e54cdc13d5ed7d08700cd04fffdee034d' 
  AND token = '4jX7ln3BFZobRuLoxYTbaJ1M/GH9UWr8O0zYHu7/oIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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