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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17c05b9a170aecb2a4d773e0545e199cf5d7f9edf1fd643119ab0009072e4908' 
  AND token = '9sYXYuFmJ0i4qQRlgU6l6sfB49xJ1XRLxneyM16AVoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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