Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a94e66092d6b6f81097aa5b3796993c34bc51092e6dc9622cb97ba3465552cbc' 
  AND token = 'eK/nIB00a/nc+Ln2Kyod6VtqmjfjVUiJ6aJxdF6G21U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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