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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5be9fff6154427dfef71a7f075eca5695fe2682dc315e9f1fd2f9e944ff9748' 
  AND token = 'M1zK+xSLvnD65+ZUyrMYRUaF30sSa7p6D0Uci0LV3ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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