Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79549344367a59d843552ae14230024eb19c6a1ba1cadb94e10aa414c8f3d30f' 
  AND token = '43cw5HZDUubMjZt9UeNfK3nhVWfIFNthcy6MbwKjOsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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