Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8364de24a6db4504f8d063fb4e2d4a1c5a0d7853af76fe1a5254b78b07850d0f' 
  AND token = 'zZkJybnHZBXaXMWY5fw3bsZCFT0fTgKm9p949P6ondc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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