Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b07ad39acbee48b35fcf51bdb34d7048016b01db09404106da60d7a5cf1b0c78' 
  AND token = 'e8z0FjHlWQs33Xv8l6QGoE5DgaFqFNF+ejwpp/cOExc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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