SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8fb956b7a04c0d87cc18ac066d84e6d06d1f6ef7237a5a3fb5f51d8bfa13949a' 
  AND token = 'IenORgBDQzRTDv2Z7BdsY2d4OKH/dbOevfKhnvwtGCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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