SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '83945935da8ab9c2265b0679df8d7e30d009f7103f49c2a17b383a4c96302e3d' 
  AND token = '07FpRWQZj9GD8n7Hvh9lrER+kCjUB1wga0b/ribFWM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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