Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '49582c9a01c11173973c452543a50f11eef9ec3f361710b20c693e21569985ab' 
  AND token = 'PVJiHKo/ew9+2dmTnIX+0atyhB2W4as8ap/cga+G42A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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