SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7a131e664f9260aa7e8f3f2d8e3610aa5297f6e11c2d5bc669e31606bb095fc8' 
  AND token = '4TGk0A4IhDCD8T9nbl1hL+DIVwJYaARtBgOE/Ko8B7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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