Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04ef61a47f36a06cd12d8df3511b4d954a5cb616e9b14929bb6e0e3763e75d0c' 
  AND token = 'JLt+o4gjqAMFYJlr0uI6LEYlo48fhgpw5d8NKs1sk1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}