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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89c920823ce9faf665bce3280498c6feca63938d1ab34676f03b7c66801b5203' 
  AND token = 'v6BtHkUc8iMsRf9C3nD/ywgoBA1xf8FRP+ft+YiA3gc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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