SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44637217fb22717015f5f7f3ae3de44f31b36c1f4dd282528c0291607f55457e' 
  AND token = 'ENVx9UdIXFCnS8G3gBZdOZCCC/2l0Mxs6ZLzwUTxqvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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