Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b559e4757f3a2d9c9fffdc1b0fd10f3e0c07166c16e3fd44d8b64a4889bee22c' 
  AND token = '9s7vJjvk1J3MmzTVR8eK0TVM9c77kYs4jKb12RlKZG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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