Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e5ce8f8604b4f6444909e0b0f31c1ba986e8db862405543952136527b876aa7' 
  AND token = 'a5s2YmDpFoVm8+eWDanK9+D1r+bT509TDxGq/LQzcik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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