Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db6ef86157b7f908fe04f3ae0fbb0459c416e7654250b67be01c9bef20ba95c1' 
  AND token = '/TrnQqHTEGtvtxIH+Y4hlK/1raW+jdKGQCEq5mAVf10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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