Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '06d3cbb0cf815a1190262ab5db9c0ec6de257d8cd82b569a875ca0f870e7e838' 
  AND token = 'V/fcwN/DC2+yIVM6wVXL9FJb4ZvOJCacunDIetHiRYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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