SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5cb29ba9f7b3c0361e2ea1ecd6919b5b9e740d61e048581fd83aca0138572d8e' 
  AND token = 'TJ9koRuKxLOI8nDZB+0mpih071Jw2++EUG04ILDp72M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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