Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b11330d5993dcb3dbc3af8e33369c77730f5c48115b85c93fafbc717d271d0f8' 
  AND token = 'TohT8k4HoNxU8E6ElnT1HSMFmj3LUhv43dwFRlzN0t0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}