Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e0dd7ec4f1b72c1205259c55c4af659673dcff5856c7c3328b593da98340337' 
  AND token = 'NwETaTl08lhRC9Fd6RNCbcgGQMNoN45E1L0mAWvGpDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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