Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1749668554704f52feb1f492ae9feac39168f48838cbfb84927f3185cd1ab9ce' 
  AND token = '1fnnPB2YC+6lj6PR+tsZAiL6a5XkOL1hdCfFE31ZThQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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